Education Commons^™

G83-681 Velvetleaf, Fred Roeth, Russell Moomaw, Alex Martin, Orvin Burnside

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide provides guidelines on how to control velvetleaf by prevention, cultural and mechanical methods, and by use of recommended herbicides.

Velvetleaf (Abutilon theophrasti Medic.), a member of the Mallow family, is related to cotton, hollyhocks, and numerous weeds. Other common names include buttonweed, Indian mallow, butterprint, piemarker, velvetweed, and cottonweed. The preferred name, velvetleaf, amply describes its velvety-textured, hairy-surfaced leaves.

A native of China and presumably introduced into the U.S. from India as a fiber crop, this annual weed is adapted to cropland throughout most of the United States. Over the past 10 years, velvetleaf has increased dramatically …

G83-665 Hemp Dogbane, John D. Furrer, Alex R. Martin, Fred W. Roeth

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes hemp dogbane, including how it spreads, and provides recommendations for cultural and chemical control. Hemp dogbane is a perennial broadleaf weed native to North America. In Nebraska it is most prevalent in the eastern and central areas, but is occasionally found throughout the state.

G83-683 Quality Concrete For Swine Facilities, David P. Shelton, Gerald R. Bodman, Thomas A. Silletto

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the major items to consider when using concrete for swine facilities to help assure that quality concrete is obtained.

Concrete is widely used to construct swine production facilities. Versatility, durability, and relatively low cost are characteristics that make it ideally suited for floors, walls, foundations, pen dividers, and manure storage structures. With appropriate design, concrete can even be used for the building roof and feeders. There are, however, certain major items to consider to help assure quality concrete and years of reliable service regardless of the specific use.

G83-684 Row Crop Planters: Equipment Adjustments And Performance In Conservation Tillage, Elbert C. Dickey, Paul J. Jasa

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses planters used in conservation tillage systems and gives recommendations for improving planter performance.

The planter's primary job is to place seed where it will germinate and grow. Proper seed spacing minimizes competition for the light, nutrients and soil moisture essential for crop growth.

Several factors influence planter performance, including adjustments and correct operation. Field conditions also are important.

Traditionally, producers used tillage equipment that created a well-tilled, residue-free seedbed for planting. Many producers now are adopting conservation tillage methods that have fewer tillage operations and leave a protective residue cover on the soil surface.

G83-673 Maturity Dates And Freeze Risks Based On Growing Degree Days, Ralph E. Neild, D. T. Smith

University of Nebraska-Lincoln Extension: Historical Materials

Explanation of growing degree days (GDD) necessary for crop maturity and tables showing estimated maturity dates and freeze risks for different GDD accumulations for different planting times in regions of Nebraska.

The concept of growing degree days (GDD) resulted from observations that:

There is a base temperature below which plants do not grow.

The rate of growth increases with temperature above this base.

Crop hybrids require different GDD accumulations to reach maturity.